I sent an email off to Jay Swoboda of EcoUrban in St. Louis asking about a discrepancy between the home listed for sale on their site and the standard specifications of the model. He says:

"The standard 1,600 square foot home has just 2 bedrooms. However, in our display home, we finished out 250 square feet in the basement and with a closet and egress, this can be considered a 3rd bedroom. Also, $279,900 is the price for our LEED-registered home at 3140 Pennsylvania (we will soon receive our Platinum designation) - we offer homes starting at $200k that are still LEED-silver certified...Another item that we are particularly proud of is our $100 per month utility bill (electric, gas, water and sewer), of which only $60 is gas & electric."